33_____

【名词&注释】

单倍体(haploid)、生活史(life history)、配子体(gametophyte)、孢子体(sporophyte)、韧皮部(phloem)、木栓形成层(cork cambium)

[单选题]33_____

A. fine
B. special
C. helpful
D. normal

查看答案&解析查看所有试题

学习资料：

[单选题]According to the text, what is the major cause of the flooding spam? 【 】

A. Companies rely on e-mail for communications.
B. More people in the world communicate by e-mail.
C. Many computer viruses contain spam e-mail.
D. More advertisers begin to promote sales through spam.

[单选题]—I’ll do the washing-up. Jack, would you please do the floors?—_______.

A. Yes, please
B. No, I don’t
C. Yes, sure
D. No, not at all

[单选题]在植物的生活史中，配子体总是单倍体，孢子体总是二倍体。( )

A. 正确
B. 错误

[单选题]树皮包括死的外树皮和活的内树皮，前者指的是周皮，后者指的是具功能的韧皮部^(phloem)。

A. 正确
B. 错误

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